Sony Alpha NEX-5R Instruction Manual page 274

Beep
Selects the sound produced when you operate the camera.
1 MENU t [Setup] t [Beep] t desired setting.
On
Off
Audible signals will be emitted when you operate the control
wheel, soft keys and control dial. The audible signals also turn
on when you touch the screen (NEX-5R only).
Turns off the audible signal.
GB
167